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hours. The researcher feels that college students sleep more than  6.9  hours on average. The researcher randomly selected  13  students and found that on average they slept  7.4  hours. The standard deviation of the sample is  1.2  hours. At  =α0.10 , is there enough evidence to say that college students sleep more than  6.9  hours on average? Assume that the population is approximately normally distributed. Use the

hours. The researcher feels that college students sleep more than  6.9  hours on average. The researcher randomly selected  13  students and found that on average they slept  7.4  hours. The standard deviation of the sample is  1.2  hours. At  =α0.10 , is there enough evidence to say that college students sleep more than  6.9  hours on average? Assume that the population is approximately normally distributed. Use the

Calculus For The Life Sciences
Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter13: Probability And Calculus
Section13.2: Expected Value And Variance Of Continuous Random Variables
Problem 10E
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Question

A person read that the average number of hours an adult sleeps on Friday night to Saturday morning was 

6.9
 hours. The researcher feels that college students sleep more than 
6.9
 hours on average. The researcher randomly selected 
13
 students and found that on average they slept 
7.4
 hours. The standard deviation of the sample is 
1.2
 hours. At 
=α0.10
, is there enough evidence to say that college students sleep more than 
6.9
 hours on average? Assume that the population is approximately normally distributed. Use the 
P
-value method and tables.

 

Part: 0 / 5
0 of 5 Parts Complete
 
Part 1 of 5
 
 
 
(a) State the hypotheses and identify the claim.
 

This hypothesis test is a _____-tailed test.
 
 
 
 
 
 

(b) Compute the test value. Always round t score values to three decimal places.

 

(c) Select the correct interval for the 

P
-value.

 

0.05 < P-value <0.10
 
0.01 < P-value <0.025
 
 
0.10 < P-value  < 0.20
 
 
P-value > 0.20
 
 
 
 

(d) Make the decision.

__________ the null hypothesis

(e) Summarize the results.

There is ___________ that college students sleep more than
6.9
 hours on average.
 
 
 
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ISBN:
9780321964038
Author:
GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:
Pearson Addison Wesley,
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